*)rata" = (100-30)% a
(a+b)/2 = 70% a
a+b = 140%a
a+b = 14/10 a
b = 14/10 a - a
b = 4/10 a
a = 10/4 b
*) rata" = 70% a
rata" = 70% (10/4 b)
rata" = 175% b
rata" = (100+75)% b
maka, rata" lebih besar 75% dari bilangan yg lain.
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*)rata" = (100-30)% a
(a+b)/2 = 70% a
a+b = 140%a
a+b = 14/10 a
b = 14/10 a - a
b = 4/10 a
a = 10/4 b
*) rata" = 70% a
rata" = 70% (10/4 b)
rata" = 175% b
rata" = (100+75)% b
maka, rata" lebih besar 75% dari bilangan yg lain.